William Wiggler woke up to the smell of blueberry leaves and nuts being roasted on a fire. Breakfast. Wigglers didn't eat meat, and in most cases preferred leaves to vegetables or fruits. Blueberry leaves were especially delicious, and cooked on an open fire with nuts, they formed a hearty Wiggler breakfast. William got up quickly from his tree stump bed and grabbed his baseball cap from the dresser. Without it, he would be indistinguishable from any other Wiggler and thus it was his only source of identity. He treasured that hat, given to him by his father who was also named William. He took one last look around the bedroom, basically just the hollow interior of a gigantic tree with various tree-inspired pieces of furniture, then went outside.
The kitchen was open air, about half way out on a massive branch so fires couldn't destroy the rest of the home. Due to the open-flames used in Wiggler cooking, this was always a serious risk. He saw his wife Wendy Wiggler, his teenage son Wyatt Wiggler and his young daughter Wanda Wiggler at the table, ready to eat.
"Hey dad!" his kids said, almost in unison. They were always happy to see him. He wished he could tell them more, tell them what he really did for a living. He never could though. William filled his plate with leaves and nuts and passively listened to the conversations at the table, more entranced by his thoughts than anything else. He couldn't stop thinking about his mission, received just last night from HQ. It would be his most difficult yet, taking him into the heart the Mushroom Kingdom to take out a target thought impossible to defeat. Many had tried and failed before him. William would succeed though. He knew it, he'd never failed a mission before and this one would be no different. William was LTM's most accomplished assassin, able to blend in with Bowser's minions and among the toads, simply because wigglers weren't seen as threats. He certainly was a threat though, able to move silently and kill with dozens of throwing daggers hidden on his body. No one had ever come close to stopping him, he was a ghost.
o-o-o
As he left to go on his journey to the Mushroom Kingdom, he hugged his wife and kids and told them he'd be back soon, reciting the same made up story about how this was some business trip to sell Wiggler shoes. In a sense, it was a business trip but instead of shoes he was selling something you couldn't refuse to buy. Death. The Wiggler swamps surprisingly had a functional international airport, though it wasn't a particularly good airport because the terminals were spread really far apart and there was no tram system. It was often the case that you would miss your connecting flight and the duty-free shops were really overpriced so it was just generally not a good airport. William flew with a fake passport under a different name, Walter Wiggler, and got on the flight without a hitch. From there it would just be a 16 hour flight until he was in the Mushroom Kingdom. He would still have to travel a bit, but he figured it would be less than 24 hours before Mario was dead.